While you're right, it's missing the forest for the trees. It's just quippy way of saying "takes care of one's hygiene"
But yes, it's mostly a common myth that you have to shower every day, ideally do what feels right/works for you to have a good hygiene
I guess it's good to hear that things are changing for the better, I emigrated from Poland when I was a child to Norway and my perception of Poland is a far less favourable one lol
Though my entire polish family are also very religious and conservative so